.demo {
    padding: 2em 0;
    transform: translate3d(0, 0, 0);
    float: left;
    width: 200px;
    height: 260px;
    margin-left: 200px;
    margin-right: 200px;
}


.navbar{
    width: 150px;
    height: 150px;
    line-height: 150px;
    /*border-radius: 50%;*/
    background: #fff;
    margin: 40px auto;
    position: relative;
    cursor: pointer;
    text-align: center;
    font-size: 1.75em;
    font-weight: bold;
    color: #99b977;
    background-color: rgba(158, 158, 158, 0);
    transition: 0.24s 0.2s;
}
.navbar:hover{
    background: rgba(178, 224, 192, 0.5);
}
.navbar .menu{
    list-style: none;
    padding: 0;
    margin: 0;
    position: absolute;
    top: -75px;
    left: -75px;
    border: 150px solid transparent;
    height: 200px;
    cursor: default;
    border-radius: 50%;
    transform: scale(0);
    transition: transform 1.4s 0.07s;
    z-index: -1;
}
.navbar:hover .menu{
    transition: transform 0.4s 0.08s, z-index   0s  0.5s;
    transform: scale(1);
    z-index: 1;
}
.navbar .menu li{
    position: absolute;
    top: -100px;
    left: -100px;
    transform-origin: 100px 100px;
    transition: all 0.5s 0.1s;
}
.navbar:hover .menu li{
    transition: all 0.6s;
}
.navbar .menu li button{
    width: 70px;
    height: 70px;
    line-height: 70px;
    border-radius: 50%;
    position: absolute;
    font-size: 60%;
    color: #99b977;
    background-color: black;
    /*background-color: black;*/
    border: none;
    transition: 0.6s;
    background-size: 80% 80%;
    background: rgba(255, 255, 255, 0) no-repeat center center;
}
.navbar:hover .menu .li1:nth-child(1){
    transition-delay: 0.02s;
    transform: rotate(135deg);
}
.navbar:hover .menu .li1:nth-child(1) button{
    transition-delay: 0.04s;
    transform: rotate(585deg);
}
.navbar:hover .menu .li1:nth-child(2){
    transition-delay: 0.04s;
    transform: rotate(315deg);
}
.navbar:hover .menu .li1:nth-child(2) button{
    transition-delay: 0.06s;
    transform: rotate(405deg);
}

.navbar:hover .menu .li2:nth-child(1){
    transition-delay: 0.02s;
    transform: rotate(45deg);
}
.navbar:hover .menu .li2:nth-child(1) button{
    transition-delay: 0.04s;
    transform: rotate(675deg);
}
.navbar:hover .menu .li2:nth-child(2){
    transition-delay: 0.04s;
    transform: rotate(105deg);
}
.navbar:hover .menu .li2:nth-child(2) button{
    transition-delay: 0.06s;
    transform: rotate(615deg);
}
.navbar:hover .menu .li2:nth-child(3){
    transition-delay: 0.06s;
    transform: rotate(165deg);
}
.navbar:hover .menu .li2:nth-child(3) button{
    transition-delay: 0.08s;
    transform: rotate(555deg);
}
.navbar:hover .menu .li2:nth-child(4){
    transition-delay: 0.08s;
    transform: rotate(225deg);
}
.navbar:hover .menu .li2:nth-child(4) button{
    transition-delay: 0.10s;
    transform: rotate(495deg);
}
.navbar:hover .menu .li2:nth-child(5){
    transition-delay: 0.10s;
    transform: rotate(285deg);
}
.navbar:hover .menu .li2:nth-child(5) button{
    transition-delay: 0.12s;
    transform: rotate(435deg);
}
.navbar:hover .menu .li2:nth-child(6){
    transition-delay: 0.12s;
    transform: rotate(345deg);
}
.navbar:hover .menu .li2:nth-child(6) button{
    transition-delay: 0.14s;
    transform: rotate(375deg);
}

.navbar:hover .menu .li3:nth-child(1){
    transition-delay: 0.02s;
    transform: rotate(45deg);
}
.navbar:hover .menu .li3:nth-child(1) button{
    transition-delay: 0.04s;
    transform: rotate(675deg);
}
.navbar:hover .menu .li3:nth-child(2){
    transition-delay: 0.04s;
    transform: rotate(135deg);
}
.navbar:hover .menu .li3:nth-child(2) button{
    transition-delay: 0.06s;
    transform: rotate(585deg);
}
.navbar:hover .menu .li3:nth-child(3){
    transition-delay: 0.06s;
    transform: rotate(225deg);
}
.navbar:hover .menu .li3:nth-child(3) button{
    transition-delay: 0.08s;
    transform: rotate(495deg);
}
.navbar:hover .menu .li3:nth-child(4){
    transition-delay: 0.08s;
    transform: rotate(315deg);
}
.navbar:hover .menu .li3:nth-child(4) button{
    transition-delay: 0.10s;
    transform: rotate(405deg);
}

.navbar:hover .menu .li4:nth-child(1){
    transition-delay: 0.02s;
    transform: rotate(45deg);
}
.navbar:hover .menu .li4:nth-child(1) button{
    transition-delay: 0.04s;
    transform: rotate(675deg);
}
.navbar:hover .menu .li4:nth-child(2){
    transition-delay: 0.04s;
    transform: rotate(105deg);
}
.navbar:hover .menu .li4:nth-child(2) button{
    transition-delay: 0.06s;
    transform: rotate(615deg);
}
.navbar:hover .menu .li4:nth-child(3){
    transition-delay: 0.06s;
    transform: rotate(165deg);
}
.navbar:hover .menu .li4:nth-child(3) button{
    transition-delay: 0.08s;
    transform: rotate(555deg);
}
.navbar:hover .menu .li4:nth-child(4){
    transition-delay: 0.08s;
    transform: rotate(225deg);
}
.navbar:hover .menu .li4:nth-child(4) button{
    transition-delay: 0.10s;
    transform: rotate(495deg);
}
.navbar:hover .menu .li4:nth-child(5){
    transition-delay: 0.10s;
    transform: rotate(285deg);
}
.navbar:hover .menu .li4:nth-child(5) button{
    transition-delay: 0.12s;
    transform: rotate(435deg);
}
.navbar:hover .menu .li4:nth-child(6){
    transition-delay: 0.12s;
    transform: rotate(345deg);
}
.navbar:hover .menu .li4:nth-child(6) button{
    transition-delay: 0.14s;
    transform: rotate(375deg);
}